JP2848166B2 - Musical instrument keyboard device - Google Patents
Musical instrument keyboard deviceInfo
- Publication number
- JP2848166B2 JP2848166B2 JP4317896A JP31789692A JP2848166B2 JP 2848166 B2 JP2848166 B2 JP 2848166B2 JP 4317896 A JP4317896 A JP 4317896A JP 31789692 A JP31789692 A JP 31789692A JP 2848166 B2 JP2848166 B2 JP 2848166B2
- Authority
- JP
- Japan
- Prior art keywords
- key
- fulcrum
- contact
- concave
- convex
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Electrophonic Musical Instruments (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は電子ピアノ等の楽器の
鍵盤装置に関し、特に鍵の演奏時における摩擦及び雑音
を低減するように改良したものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keyboard device for a musical instrument such as an electronic piano, and more particularly to an improved keyboard device for reducing friction and noise when playing keys.
【０００２】[0002]
【従来の技術】従来における楽器の鍵盤装置として、特
公平１−２８９５６号公報（以下、第１従来例とい
う。）及び特公昭４５−８８２８号公報（以下、第２従
来例という。）にそれぞれ開示されているものがある。2. Description of the Related Art Japanese Patent Publication No. 1-28956 (hereinafter referred to as "first conventional example") and Japanese Patent Publication No. Sho 45-8828 (hereinafter referred to as "second conventional example") respectively show conventional keyboard devices for musical instruments. Some have been disclosed.
【０００３】前者の第１従来例のものは、鍵の後端部下
面に設けた略Ｌ字状の係合突起を鍵支持部材に穿設した
係合孔に係合し、前記鍵を前記鍵支持部材に前記係合突
起と前記係合孔縁部との当接部を支点として上下方向に
回動自在に支持し、この支点部と案内部材とによって前
記鍵の左右方向及びローリング方向（鍵の前後方向に沿
う軸線を中心として回転する方向）の動きを抑制したも
のである。In the first conventional example, a substantially L-shaped engaging projection provided on the lower surface of a rear end portion of a key is engaged with an engaging hole formed in a key support member, and the key is engaged with the key. The key support member is rotatably supported in a vertical direction with a contact portion between the engagement protrusion and the edge of the engagement hole as a fulcrum, and the fulcrum portion and the guide member allow the key to move in the left-right direction and in the rolling direction ( (In the direction of rotation about an axis along the front-rear direction of the key).
【０００４】また、後者の第２従来例のものは、鍵の後
端部と鍵支持部材とを左右方向（水平方向）に沿う１本
の接触線を有する線接触状態及び左右方向略中間部に１
つの接触点を有する点接触状態で接触させることによ
り、前記鍵を前記鍵支持部材に前記接触部を支点として
上下方向に回動自在に支持し、この支点部と案内部材と
によって前記鍵の左右方向及びローリング方向の動きを
抑制したものである。In the second prior art, the rear end of the key and the key support member are arranged in a line contact state having one contact line extending in the left-right direction (horizontal direction) and at a substantially middle portion in the left-right direction. 1 in
The key is contacted in a point contact state having two contact points, so that the key is rotatably supported on the key support member in the vertical direction with the contact portion as a fulcrum. The movement in the direction and the rolling direction is suppressed.
【０００５】[0005]
【発明が解決しようとする課題】上述した第１従来例の
ものは、支点部で鍵の左右方向及びローリング方向の動
きを抑制すると共に、案内部材でも鍵の左右方向とロー
リング方向の動きを抑制している。このため、鍵自体の
そり・ねじれ、案内部材の傾斜・ねじれ或は係合突起の
ゆがみ等、構成部品の加工精度や取付精度にわずかな誤
差があっても、鍵が案内部材にねじる方向の作用力を及
ぼしてしまい、雑音を発生すると共に、鍵が円滑に動作
せず、鍵のタッチ感（操作感）が悪くなる。また、鍵の
下面と係合突起との間の寸法と、鍵支持部材の板厚寸法
とが正確に一致しないため、係合突起と係合孔との係合
部に隙間が生じて、がたつくことによって、雑音を発生
する。The first prior art described above suppresses the movement of the key in the left-right direction and the rolling direction at the fulcrum, and the guide member also suppresses the movement of the key in the left-right direction and the rolling direction. doing. For this reason, even if there is a slight error in the processing accuracy or mounting accuracy of the components such as the warp / twist of the key itself, the inclination / twist of the guide member, or the distortion of the engagement protrusion, the key cannot be twisted into the guide member. It exerts an action force, generates noise, and the key does not operate smoothly, resulting in a poor touch feeling (operating feeling) of the key. In addition, since the dimension between the lower surface of the key and the engagement projection does not exactly match the thickness of the key support member, a gap is formed in the engagement portion between the engagement projection and the engagement hole, and the backlash is generated. This generates noise.
【０００６】更に、第２従来例のものは、鍵の左右方向
へのずれを吸収し得るように構成されていないため、鍵
をずれたままセットすると、押鍵時にがたつきが生じた
部分において雑音を発生する。また、線接触部は左右方
向に沿う１本の接触線を有する線接触状態のため、鍵の
ローリング方向への動きを抑制するための案内部材が必
要であり、それだけ鍵の摩擦部が多くなり、鍵が円滑に
動作せず、鍵のタッチ感が悪くなる。Further, since the second conventional example is not configured to absorb the shift of the key in the left-right direction, if the key is set with the key shifted, a portion of the key which is loose when the key is pressed is generated. Generates noise. In addition, since the line contact portion is a line contact state having one contact line along the left and right direction, a guide member for suppressing the movement of the key in the rolling direction is necessary, and the friction portion of the key increases accordingly. However, the key does not operate smoothly and the touch feeling of the key deteriorates.
【０００７】この発明は上記事情に鑑みてなされたもの
で、演奏時における鍵側支点部と鍵支持部材側支点部と
の摩擦及び雑音を低減した楽器の鍵盤装置を提供するこ
とを目的とするものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a keyboard device for a musical instrument in which friction and noise between a key-side fulcrum and a key-supporting member-side fulcrum during performance are reduced. Things.
【０００８】[0008]
【課題を解決するための手段】斯かる目的を達成するた
め請求項１記載の楽器の鍵盤装置は、鍵支持部材に設け
られた第１の支点部に、鍵に設けられた第２の支点部を
押圧手段で押圧した状態で互いに当接させ、これら第１
及び第２の支点部の互いに当接した部位を支点として前
記鍵を上下方向に回動自在にすると共に、前記鍵を鍵復
帰手段により上方に回動付勢してなる楽器の鍵盤装置に
おいて、前記第１及び第２の支点部のいずれか一方を凹
状とすると共に他方を凸状とし、前記凹状支点部の左右
側面と前記凸状支点部の左右側面とが互いに当接し、前
記凹状支点部の左右側面のいずれか一方の側面と、該一
方の側面に当接する前記凸状支点部の一方の側面とを、
これら両側面が互いに接触したとき上下方向に沿う１本
の接触線を有する線接触状態となる形状にしたことを特
徴とするものである。In order to achieve the above object, a keyboard device for a musical instrument according to the present invention has a first fulcrum provided on a key support member and a second fulcrum provided on a key. Parts are pressed against each other while being pressed by pressing means.
And a key device for turning the key up and down by key return means while allowing the key to rotate vertically using the parts of the second fulcrum part that abut on each other as a fulcrum. wherein one of the first and second fulcrum portion and the other as a convex with a concave, and left and right side surfaces of the concave fulcrum and left and right side surfaces of the convex fulcrum portion abut each other, before
Either one of the left and right side surfaces of the concave fulcrum portion and one side surface of the convex fulcrum portion abutting on the one side surface,
When these two side surfaces come into contact with each other, they are formed in a line contact state having one contact line extending in the vertical direction.
【０００９】また、同じく請求項２記載の楽器の鍵盤装
置は、鍵支持部材に設けられた第１の支点部に、鍵に設
けられた第２の支点部を押圧手段で押圧した状態で互い
に当接させ、これら第１及び第２の支点部の互いに当接
した部位を支点として前記鍵を上下方向に回動自在にす
ると共に、前記鍵を鍵復帰手段により上方に回動付勢し
てなる楽器の鍵盤装置において、前記第１及び第２の支
点部のいずれか一方を凹状とすると共に他方を凸状と
し、前記凹状支点部の左右側面と前記凸状支点部の左右
側面とが互いに当接し、前記凹状支点部の左右側面間で
形成される間隔が挿入口の間隔より奥側の間隔の方を狭
くなるように形成し、前記凹状支点部の左右側面のいず
れか一方の側面と、該一方の側面に当接する前記凸状支
点部の一方の側面とを、これら両側面が互いに接触した
とき上下方向に沿う１本の接触線を有する線接触状態と
なる形状にしたことを特徴とするものである。Further, in the keyboard device for a musical instrument according to the present invention, the second fulcrum provided on the key is pressed against the first fulcrum provided on the key support member by pressing means. The key is made rotatable in the vertical direction with the first and second fulcrum portions in contact with each other as a fulcrum, and the key is urged upward by key return means. In one embodiment, one of the first and second fulcrum portions is concave and the other is convex, and the left and right side surfaces of the concave fulcrum portion and the left and right side surfaces of the convex fulcrum portion are mutually opposed. Abut, the interval formed between the left and right side surfaces of the concave fulcrum portion is formed so that the interval on the back side is narrower than the interval of the insertion port, and either one of the left and right side surfaces of the concave fulcrum portion and , One side surface of the convex fulcrum portion abutting on the one side surface , Is characterized in that these side surfaces has a shape which is line contact having one contact line along the vertical direction when in contact with each other.
【００１０】また、同じく請求項３記載の楽器の鍵盤装
置は、鍵支持部材に設けられた第１の支点部に、鍵に設
けられた第２の支点部を押圧手段で押圧した状態で互い
に当接させ、これら第１及び第２の支点部の互いに当接
した部位を支点として前記鍵を上下方向に回動自在にす
ると共に、前記鍵を鍵復帰手段により上方に回動付勢し
てなる楽器の鍵盤装置において、前記第１及び第２の支
点部のいずれか一方を凹状とすると共に他方を凸状と
し、前記凹状支点部の左右側面と前記凸状支点部の左右
側面とが互いに当接し、前記凹状支点部の左右側面のい
ずれか一方の側面と該一方の側面に当接する前記凸状支
点部の一方の側面とを、これら両側面が互いに接触した
とき上下方向に沿う１本の接触線を有する線接触状態と
なる形状にし、更に前記凹状支点部の他方の側面と該他
方の側面に当接する前記凸状支点部の他方の側面とが、
互いに接触したとき回動自在な接触状態となる形状にし
たことを特徴とするものである。Also, in the keyboard device for a musical instrument according to the present invention, the first fulcrum provided on the key support member is pressed against the second fulcrum provided on the key by the pressing means. The key is made rotatable in the vertical direction with the first and second fulcrum portions in contact with each other as a fulcrum, and the key is urged upward by key return means. In one embodiment, one of the first and second fulcrum portions is concave and the other is convex, and the left and right side surfaces of the concave fulcrum portion and the left and right side surfaces of the convex fulcrum portion are mutually opposed. One of the right and left side surfaces of the concave fulcrum portion and one of the side surfaces of the convex fulcrum portion abutting on the one side surface are aligned along the vertical direction when these two side surfaces contact each other. Into a line contact state having a contact line of And the other side surface of the convex fulcrum abutting the other side and the side surface of said other serial concave fulcrum portion,
It is characterized in that it is shaped so as to be rotatable when in contact with each other.
【００１１】また、同じく請求項４記載の楽器の鍵盤装
置は、鍵支持部材に設けられた第１の支点部に、鍵に設
けられた第２の支点部を押圧手段で押圧した状態で互い
に当接させ、これら第１及び第２の支点部の互いに当接
した部位を支点として前記鍵を上下方向に回動自在にす
ると共に、前記鍵を鍵復帰手段により上方に回動付勢し
てなる楽器の鍵盤装置において、前記第１及び第２の支
点部は、少なくとも一部において、前記鍵の側面に平行
な接触線を有する線接触状態で互いに常に当接して鍵左
右方向の揺動を許容しつつ鍵長手方向軸回りのローリン
グを抑制する支点構造を有し、前記第１及び第２の支点
部から所定距離、該軸方向に離れた鍵摺動部が接触型の
案内部材を鍵支持部材に設け、該案内部材により前記鍵
の左右の動きを規制したことを特徴とするものである。
また、同じく請求項５記載の楽器の鍵盤装置は、請求項
４記載の楽器の鍵盤装置において、前記鍵摺動部が点接
触型であることを特徴とするものである。また、同じく
請求項６記載の楽器の鍵盤装置は、鍵支持部材に設けら
れた第１の支点部に、鍵に設けられた第２の支点部を押
圧手段で押圧した状態で互いに当接させ、これら第１及
び第２の支点部の互いに当接した部位を支点として前記
鍵を上下方向に回動自在にすると共に、前記鍵を鍵復帰
手段により上方に回動付勢してなる楽器の鍵盤装置にお
いて、前記第１及び第２の支点部のいずれか一方を凹状
とすると共に他方を凸状とし、前記凹状支点部の左右側
面間で形成される間隔が挿入口の間隔より奥側の間隔の
方を狭く形成し、前記凹状支点部の左右側面のいずれか
一方の側面と該一方の側面に当接する前記凸状支点部の
一方の側面とを、これら両側面が互いに接触したとき上
下方向に沿う１本の接触線を有する線接触状態となる形
状にし、更に前記凹状支点部の他方の側面と該他方の側
面に当接する前記凸状支点部の他方の側面とが、互いに
接触したとき回動自在な接触状態となる形状にしたこと
を特徴とするものである。また、同じく請求項７記載の
楽器の鍵盤装置は、鍵支持部材に設けられた第１の支点
部に、鍵に設けられた第２の支点部を押圧手段で押圧し
た状態で互いに当接させ、これら第１及び第２の支点部
の互いに当接した部位を支点として前記鍵を上下方向に
回動自在にすると共に、前記鍵を鍵復帰手段により上方
に回動付勢してなる楽器の鍵盤装置において、前記第１
及び第２の支点部のいずれか一方を凹状とすると共に他
方を凸状とし、前記凹状支点部の左右側面と前記凸状支
点部の左右側面とが互いに当接し、前記凹状支点部の左
右側面のいずれか一方の側面の形状を平面とし、該平面
状側面に当接する前記凸状支点部の一方の側面形状を略
半円弧面とすることにより、これら両面が互いに接触し
たとき上下方向に沿う１本の接触線を有する線接触状態
とし、更に前記凹状支点部の他方の側面を略半円弧面と
し、該他方の側面に当接する前記凸状支点部の他方の側
面を略半球面とすることにより、これら両面が互いに接
触したとき上下方向に沿う所定接触部が１つの接触点を
有する点接触状態となる如くしたことを特徴とするもの
である。また、同じく請求項８記載の楽器の鍵盤装置
は、鍵支持部材に設けられた第１の支点部に、鍵に設け
られた第２の支点部を押圧手段で押圧した状態で互いに
当接させ、これら第１及び第２の支点部の互いに当接し
た部位を支点として前記鍵を上下方向に回動自在にする
と共に、前記鍵を鍵復帰手段により上方に回動付勢して
なる楽器の鍵盤装置において、前記第１及び第２の支点
部のいずれか一方を凹状とすると共に他方を凸状とし、
前記凹状支点部の左右側面と前記凸状支点部の左右側面
とが互いに当接し、前記凹状支点部の左右側面のいずれ
か一方の側面の形状を略半円弧面とし、該凹状支点部の
一方の側面に当接する前記凸状支点部の一方の側面形状
を平面とすることにより、これら両面が互いに接触した
とき上下方向に沿う１本の接触線を有する線接触状態と
し、更に前記凹状支点部の他方の側面を略半円弧面と
し、該他方の側面に当接する前記凸状支点部の他方の側
面を略半球面とすることにより、これら両面が互いに接
触したとき上下方向に沿う所定接触部が１つの接触点を
有する点接触状態となる如くしたことを特徴とするもの
である。また、同じく請求項９記載の楽器の鍵盤装置
は、鍵支持部材に設けられた第１の支点部に、鍵に設け
られた第２の支点部を押圧手段で押圧した状態で互いに
当接させ、これら第１及び第２の支点部の互いに当接し
た部位を支点として前記鍵を上下方向に回動自在にする
と共に、前記鍵を鍵復帰手段により上方に回動付勢して
なる楽器の鍵盤装置において、前記第１及び第２の支点
部のいずれか一方を凹状とすると共に他方を凸状とし、
前記凹状支点部の左右側面と前記凸状支点部の左右側面
とが互いに当接し、前記凹状支点部の左右側面のいずれ
か一方の側面の形状を略半円弧面とし、該凹状支点部の
一方の側面に当接する前記凸状支点部の一方の側面形状
を平面とすることにより、これら両面が互いに接触した
とき上下方向に沿う１本の接触線を有する線接触状態と
し、更に前記凹状支点部の他方の側面を中央部にくびれ
部のある鼓胴状面とし、該他方の側面に当接する前記凸
状支点部の他方の側面を略半円弧面とすることにより、
これら両面が互いに接触したとき上下方向に沿う所定接
触部が１つの接触点を有する点接触状態となる如くした
ことを特徴とするものである。Also, in the musical instrument keyboard device according to the present invention, the first fulcrum provided on the key support member is pressed against the second fulcrum provided on the key by pressing means. The key is made rotatable in the vertical direction with the first and second fulcrum portions in contact with each other as a fulcrum, and the key is urged upward by key return means. In the keyboard device for a musical instrument, the first and second fulcrum portions are at least partially parallel to a side surface of the key.
A fulcrum structure that suppresses rolling about the key longitudinal axis while always abutting each other in a line contact state having a strong contact line and allowing the key to swing in the left-right direction, from the first and second fulcrum portions. A key sliding portion separated by a predetermined distance in the axial direction has a contact-type guide member provided on the key support member, and the key member regulates the left and right movement of the key.
A keyboard device for a musical instrument according to a fifth aspect of the present invention is the keyboard device for a musical instrument according to the fourth aspect, wherein the key sliding portion is a point contact type. Further, in the keyboard device for a musical instrument according to the present invention, the second fulcrum provided on the key is pressed against the first fulcrum provided on the key support member by pressing means. The key is rotatable in the vertical direction with the first and second fulcrum portions in contact with each other as fulcrums, and the key is urged upward by key return means. In the keyboard device, one of the first and second fulcrum portions is concave and the other is convex, and a space formed between the left and right side surfaces of the concave fulcrum portion is located on the back side of the space between the insertion holes. The interval is formed to be narrower, and either one of the left and right side surfaces of the concave fulcrum portion and one side surface of the convex fulcrum portion abutting on the one side surface are moved up and down when these two side surfaces contact each other. Into a line contact state with one contact line along the direction Further, the other side surface of the concave fulcrum portion and the other side surface of the convex fulcrum portion abutting on the other side surface are formed into a rotatable contact state when they come into contact with each other. Things. Also, in the keyboard device for a musical instrument according to the present invention, the second fulcrum provided on the key is brought into contact with the first fulcrum provided on the key support member while the second fulcrum provided on the key is pressed by the pressing means. The key is rotatable in the vertical direction with the first and second fulcrum portions in contact with each other as fulcrums, and the key is urged upward by key return means. In the keyboard device, the first device
And one of the second fulcrum portions is concave and the other is convex, the left and right side surfaces of the concave fulcrum portion and the left and right side surfaces of the convex fulcrum portion contact each other, and the left and right side surfaces of the concave fulcrum portion The shape of one of the side surfaces is a flat surface, and the shape of one side surface of the convex fulcrum portion abutting on the flat side surface is a substantially semi-circular surface, so that when these two surfaces come into contact with each other, they are aligned in the vertical direction. In a line contact state having one contact line, the other side surface of the concave fulcrum portion is substantially a semi-circular arc surface, and the other side surface of the convex fulcrum portion abutting the other side surface is a substantially hemispherical surface. Thus, when these two surfaces come into contact with each other, the predetermined contact portion along the vertical direction is in a point contact state having one contact point. Also, in the keyboard device for a musical instrument according to the present invention, the second fulcrum provided on the key is pressed against the first fulcrum provided on the key support member by the pressing means. The key is rotatable in the vertical direction with the first and second fulcrum portions in contact with each other as fulcrums, and the key is urged upward by key return means. In the keyboard device, one of the first and second fulcrum portions is concave and the other is convex.
The left and right side surfaces of the concave fulcrum portion and the left and right side surfaces of the convex fulcrum portion are in contact with each other, and the shape of one of the left and right side surfaces of the concave fulcrum portion is substantially a semicircular arc surface, and one of the concave fulcrum portions By making one side surface shape of the convex fulcrum portion abutting on the side surface of a flat surface, when these two surfaces come into contact with each other, a line contact state having one contact line along the vertical direction is obtained, and the concave fulcrum portion is further formed. The other side surface is a substantially semi-circular surface, and the other side surface of the convex fulcrum portion abutting the other side surface is a substantially hemispherical surface, so that when these two surfaces come into contact with each other, a predetermined contact portion along the vertical direction Is a point contact state having one contact point. Also, in the keyboard device for a musical instrument according to the ninth aspect, the second fulcrum provided on the key is pressed against the first fulcrum provided on the key support member by the pressing means. The key is rotatable in the vertical direction with the first and second fulcrum portions in contact with each other as fulcrums, and the key is urged upward by key return means. In the keyboard device, one of the first and second fulcrum portions is concave and the other is convex.
The left and right side surfaces of the concave fulcrum portion and the left and right side surfaces of the convex fulcrum portion are in contact with each other, and the shape of one of the left and right side surfaces of the concave fulcrum portion is substantially a semicircular arc surface, and one of the concave fulcrum portions By making one side surface shape of the convex fulcrum portion abutting on the side surface of a flat surface, when these two surfaces come into contact with each other, a line contact state having one contact line along the vertical direction is obtained, and the concave fulcrum portion is further formed. By making the other side surface of the drum-shaped surface with a constricted portion in the center, and making the other side surface of the convex fulcrum portion abutting on the other side surface a substantially semi-arc surface,
When these two surfaces come into contact with each other, a predetermined contact portion along the vertical direction is in a point contact state having one contact point.
【００１２】[0012]
【作用】請求項１記載の楽器の鍵盤装置は、凹状支点部
の左右側面のいずれか一方の側面と、凸状支点部の一方
の側面との接触状態が上下方向に沿う１本の接触線を有
する線接触状態となる。このため鍵は鍵盤として使用す
る動きの範囲で上下及び左右方向にそれぞれ動くことが
できると共に、案内部材を設けることなく前記鍵のロー
リング方向の動きが抑制される。According to a first aspect of the present invention, there is provided a keyboard device for a musical instrument, wherein one of the right and left side surfaces of the concave fulcrum portion and one of the side surfaces of the convex fulcrum portion have a contact line extending vertically. In a line contact state. Therefore, the key can move up and down and left and right in the range of movement used as a keyboard, and the movement of the key in the rolling direction can be suppressed without providing a guide member.
【００１３】また、請求項２記載の楽器の鍵盤装置は、
凹状支点部の左右側面のいずれか一方の側面と、該一方
の側面に当接する凸状支点部の一方の側面とが接触した
とき、上下方向に沿う１本の接触線を有する線接触状態
となる。また、前記凹状支点部の他方の側面と、該他方
の側面に当接する前記凸状支点部の他方の側面とが互い
に接触したとき、回動自在な接触状態となる。このため
鍵は鍵盤として使用する動きの範囲で上下及び左右方向
にそれぞれ動くことができると共に、案内部材を設ける
ことなく前記鍵のローリング方向の動きが抑制される。The keyboard device of the musical instrument according to claim 2 is
When one of the left and right side surfaces of the concave fulcrum portion is in contact with one side surface of the convex fulcrum portion abutting on the one side surface, a line contact state having one contact line along the vertical direction is obtained. Become. In addition, when the other side surface of the concave fulcrum portion and the other side surface of the convex fulcrum portion abutting on the other side surface come into contact with each other, a rotatable contact state is established. Therefore, the key can move up and down and left and right in the range of movement used as a keyboard, and the movement of the key in the rolling direction can be suppressed without providing a guide member.
【００１４】また、請求項３記載の楽器の鍵盤装置は、
凹状支点部の左右側面のいずれか一方の側面と、一方の
側面に当接する凸状支点部の一方の側面とが接触したと
き、上下方向に沿う１本の接触線を有する線接触状態と
なる。また前記凹状支点部の他方の側面と、該他方の側
面に当接する前記凸状支点部の他方の側面とが互いに接
触したとき、回動自在な接触状態となる。このため鍵は
鍵盤として使用する動きの範囲で上下及び左右方向にそ
れぞれ動くことができると共に、案内部材を設けること
なく前記鍵のローリング方向の動きが抑制される。The keyboard device for a musical instrument according to claim 3 is
When either one of the left and right side surfaces of the concave fulcrum portion and one side surface of the convex fulcrum portion abutting on one side surface come into a line contact state having one contact line along the vertical direction. . When the other side surface of the concave fulcrum portion and the other side surface of the convex fulcrum portion that abut on the other side surface contact each other, a rotatable contact state is established. Therefore, the key can move up and down and left and right in the range of movement used as a keyboard, and the movement of the key in the rolling direction can be suppressed without providing a guide member.
【００１５】また、請求項４記載の楽器の鍵盤装置は、
第１の支点部と第２の支点部が少なくとも一部におい
て、前記鍵の側面に平行な接触線を有する線接触状態で
互いに常に当接するという支点構造そのもので鍵の長手
方向軸回りのローリングを抑制しているので、摩擦が少
なくなって鍵の動きが円滑になり、鍵のタッチ感が良好
となると共に、雑音の発生が抑制される。しかも前記支
点構造は鍵の左右方向の揺動を許容するので、案内部材
による摩擦及びメカノイズが少なくなる。さらに、案内
部材は鍵の左右方向の動きのみを規制すればよいので、
該案内部材の加工精度が緩和され、しかも案内部材がラ
フでよい結果、該案内部材が多少ゆがんで配置されたと
しても、きしみ、ノイズ及び摩擦が小さくて済み、鍵の
タッチ感（スムーズ性）が向上する。また、請求項５記
載の楽器の鍵盤装置は、案内部材に鍵摺動部が点接触す
るため、案内部材による摩擦及びメカノイズがより一層
抑制される。また、請求項６記載の楽器の鍵盤装置は、
凹状支点部の左右側面のいずれか一方の側面と、一方の
側面に当接する凸状支点部の一方の側面とが接触したと
き、上下方向に沿う１本の接触線を有する線接触状態と
なる。また前記凹状支点部の他方の側面と、該他方の側
面に当接する前記凸状支点部の他方の側面とが互いに接
触したとき、回動自在な接触状態となる。このため鍵は
鍵盤として使用する動きの範囲で上下及び左右方向にそ
れぞれ動くことができると共に、案内部材を設けること
なく前記鍵のローリング方向の動きが抑制される。ま
た、請求項７記載の楽器の鍵盤装置は、凹状支点部の左
右側面のいずれか一方の側面と、一方の側面に当接する
凸状支点部の一方の側面とが接触したとき、上下方向に
沿う１本の接触線を有する線接触状態となる。また前記
凹状支点部の他方の側面と、該他方の側面に当接する前
記凸状支点部の他方の側面とが互いに接触したとき、上
下方向に沿う所定接触部が１つの接触点を有する点接触
状態となる。このため鍵は鍵盤として使用する動きの範
囲で上下及び左右方向にそれぞれ動くことができると共
に、案内部材を設けることなく前記鍵のローリング方向
の動きが抑制される。また、請求項８記載の楽器の鍵盤
装置は、凹状支点部の左右側面のいずれか一方の側面
と、一方の側面に当接する凸状支点部の一方の側面とが
接触したとき、上下方向に沿う１本の接触線を有する線
接触状態となる。また前記凹状支点部の他方の側面と、
該他方の側面に当接する前記凸状支点部の他方の側面と
が互いに接触したとき、上下方向に沿う所定接触部が１
つの接触点を有する点接触状態となる。このため鍵は鍵
盤として使用する動きの範囲で上下及び左右方向にそれ
ぞれ動くことができると共に、案内部材を設けることな
く前記鍵のローリング方向の動きが抑制される。また、
請求項９記載の楽器の鍵盤装置は、凹状支点部の左右側
面のいずれか一方の側面を略半円筒面とし、この面に当
接する凸状支点部の一方の側面をフラット面としたこと
により、これらの面の接触状態が上下方向に沿う１本の
接触線を有する線接触となる。また、前記凹状支点部の
他方の側面を中央部がくびれた鼓胴状面とし、この面に
当接する前記凸状支点部の他方の側面を略半円筒面とし
たことにより、これらの面の接触状態が上下方向略中間
部に１つの接触点を有する点接触となる。このため鍵は
鍵盤として使用する動きの範囲で上下及び左右方向にそ
れぞれ動くことができると共に、案内部材を設けること
なく前記鍵のローリング方向の動きが抑制される。The keyboard device of the musical instrument according to claim 4 is
The first fulcrum and the second fulcrum are at least partially
In a line contact state having a contact line parallel to the side of the key
The fulcrum structure itself, which always touches each other,
Rolling around the directional axis is suppressed, so friction is low.
The key movement is smooth and the key touch feeling is good
And generation of noise is suppressed. Moreover, the support
The point structure allows the key to swing left and right, so the guide member
Friction and mechanical noise are reduced. Further guidance
The member only needs to regulate the left and right movement of the key,
The processing accuracy of the guide member is reduced, and the guide member is
As a result, the guide member may be slightly distorted.
Even so, squeaks, noise and friction are small and the key
Touch feeling (smoothness) is improved. In the keyboard device for a musical instrument according to the fifth aspect, the key sliding portion makes point contact with the guide member, so that friction and mechanical noise caused by the guide member are further suppressed. Further, the keyboard device of the musical instrument according to claim 6,
When either one of the left and right side surfaces of the concave fulcrum portion and one side surface of the convex fulcrum portion abutting on one side surface come into a line contact state having one contact line along the vertical direction. . When the other side surface of the concave fulcrum portion and the other side surface of the convex fulcrum portion that abut on the other side surface contact each other, a rotatable contact state is established. Therefore, the key can move up and down and left and right in the range of movement used as a keyboard, and the movement of the key in the rolling direction can be suppressed without providing a guide member. Further, the keyboard device of the musical instrument according to claim 7, when any one of the left and right side surfaces of the concave fulcrum portion comes into contact with one side surface of the convex fulcrum portion abutting on one side surface, the vertical direction. A line contact state having one contact line along is obtained. Further, when the other side surface of the concave fulcrum portion and the other side surface of the convex fulcrum portion abutting on the other side surface contact each other, a predetermined contact portion along the vertical direction has one point of contact. State. Therefore, the key can move up and down and left and right in the range of movement used as a keyboard, and the movement of the key in the rolling direction can be suppressed without providing a guide member. Further, the keyboard device of the musical instrument according to claim 8, when any one of the left and right side surfaces of the concave fulcrum portion and one side surface of the convex fulcrum portion abutting the one side surface, the vertical direction. A line contact state having one contact line along is obtained. Also, the other side surface of the concave fulcrum portion,
When the other side surface of the convex fulcrum portion abutting on the other side surface comes into contact with each other, a predetermined contact portion along the up-down direction becomes 1
A point contact state having two contact points is obtained. Therefore, the key can move up and down and left and right in the range of movement used as a keyboard, and the movement of the key in the rolling direction can be suppressed without providing a guide member. Also,
The keyboard device for a musical instrument according to claim 9, wherein one of the left and right side surfaces of the concave fulcrum portion is a substantially semi-cylindrical surface, and the other side surface of the convex fulcrum portion abutting this surface is a flat surface. The contact state of these surfaces is a line contact having one contact line along the vertical direction. Further, the other side surface of the concave fulcrum portion is a drum-shaped surface with a constricted central portion, and the other side surface of the convex fulcrum portion abutting this surface is a substantially semi-cylindrical surface, so that these surfaces are The contact state is a point contact having one contact point at a substantially middle portion in the vertical direction. Therefore, the key can move up and down and left and right in the range of movement used as a keyboard, and the movement of the key in the rolling direction can be suppressed without providing a guide member.
【００１６】なお、請求項１〜９の構成で、もし案内部
材を設けるとしても非押鍵位置から押鍵終了位置の全位
置を案内しなくても、例えば鍵ストロークのうちの一点
を案内するだけで鍵の左右方向を規制できる。According to the first to ninth aspects of the present invention, even if the guide member is provided, for example, one point of the key stroke is guided without guiding the entire position from the non-depressed position to the depressed position. The right and left direction of the key can be regulated with just the key.
【００１７】[0017]
【実施例】以下、本発明の実施例を図面に基づき説明す
る。Embodiments of the present invention will be described below with reference to the drawings.
【００１８】［第１実施例］図１は本発明の第１実施例
に係る楽器の鍵盤装置の一部を切欠した要部斜視図であ
り、同図中、１は金属板等からなる鍵盤フレームで、そ
の上面には多数の鍵（白鍵と黒鍵）が互いに平行に並べ
た状態で配設されるが、図１においては１つの鍵（白
鍵）２のみが図示されている。この鍵２は合成樹脂製
で、下面が開口する断面略コ字状をなしている。[First Embodiment] FIG. 1 is a perspective view of an essential part of a keyboard device for a musical instrument according to a first embodiment of the present invention, in which a part of the keyboard device is cut away. In the frame, a large number of keys (white keys and black keys) are arranged on the upper surface thereof in parallel with each other, but only one key (white key) 2 is shown in FIG. The key 2 is made of synthetic resin and has a substantially U-shaped cross section with an open lower surface.
【００１９】鍵盤フレーム１の後端縁には垂直上方に向
けて後端壁３が折曲形成されている。鍵盤フレーム１の
前端縁には垂直下方に向けて前端壁４が折曲形成されて
いる。この前端壁４の下端縁には水平前方に向けて水平
壁５が折曲形成されている。この水平壁５の前端縁には
垂直上方に向けて前端壁４の高さの略１／４程度の高さ
に設定された前縁壁６が折曲形成されている。A rear end wall 3 is formed at the rear end edge of the keyboard frame 1 so as to be bent vertically upward. A front end wall 4 is formed at the front end of the keyboard frame 1 so as to be bent vertically downward. A horizontal wall 5 is bent at the lower edge of the front end wall 4 toward the horizontal front. At the front end of the horizontal wall 5, a front edge wall 6, which is set to be approximately １ ／ of the height of the front end wall 4 vertically upward, is bent.
【００２０】鍵盤フレーム１の後端側上面には鍵支持部
材７が設けられている。この鍵支持部材７は、断面長方
形の細長杆状をなしており、その上下方向に貫通するボ
ルト挿通孔８が長手方向に所定間隔を存して複数個（図
１においては１個のみ図示）穿設されている。そして、
鍵支持部材７は、その後面を後端壁３の前面に密着させ
た状態にして鍵盤フレーム１の上面にセットし、各ボル
ト挿通孔８に挿通したボルト９により、この鍵盤フレー
ム１に固定されている。A key support member 7 is provided on the rear end upper surface of the keyboard frame 1. The key support member 7 has an elongated rod shape with a rectangular cross section, and a plurality of bolt insertion holes 8 penetrating in the vertical direction are provided at predetermined intervals in the longitudinal direction (only one is shown in FIG. 1). Has been drilled. And
The key support member 7 is set on the upper surface of the keyboard frame 1 with its rear surface in close contact with the front surface of the rear end wall 3, and is fixed to the keyboard frame 1 by the bolts 9 inserted into the bolt insertion holes 8. ing.
【００２１】鍵支持部材７の内部には、その前面におい
て開口する凹状支点部１０が長手方向に間隔を存して鍵
２と対応する数だけ（図１においては１個のみ図示）設
けられている。この凹状支点部１０は、図２に示す如く
左右側面部１１，１２を、その相互間が内端側に向かう
に従い漸次狭くなる如く傾斜して、くさび効果が得られ
るようになっている。凹状支点部１０の左側面１１はフ
ラット面とされ、且つ右側面１２は水平軸線を有する略
半円筒面とされている。Inside the key support member 7, concave fulcrum portions 10 which are open at the front surface thereof are provided in a number corresponding to the number of the keys 2 at intervals in the longitudinal direction (only one is shown in FIG. 1). I have. As shown in FIG. 2, the concave fulcrum portion 10 inclines the left and right side surface portions 11 and 12 so that the distance between the left and right side portions 11 and 12 becomes gradually narrower toward the inner end side, so that a wedge effect can be obtained. The left side surface 11 of the concave fulcrum 10 is a flat surface, and the right side surface 12 is a substantially semi-cylindrical surface having a horizontal axis.
【００２２】このような構成の凹状支点部１０の左右側
面１１，１２に、図２に示す如く鍵２の後端部に一体形
成された凸状支点部１３の左右側面１４，１５が当接す
る。この凸状支点部１３の左側面１４は垂直軸線を有す
る略半円筒面とされ、且つ右側面１５は略半球面とされ
ている。凸状支点部１３の左側面１４の略半円筒面の垂
直軸線の上下方向略中間部に、右側面１５の略半球面の
水平軸線が交差している。As shown in FIG. 2, the left and right side surfaces 14 and 15 of the convex fulcrum portion 13 integrally formed on the rear end of the key 2 come into contact with the left and right side surfaces 11 and 12 of the concave fulcrum portion 10 having such a configuration. . The left side surface 14 of the convex fulcrum 13 is a substantially semi-cylindrical surface having a vertical axis, and the right side surface 15 is a substantially hemispherical surface. A horizontal axis of a substantially hemispherical surface of the right side surface 15 intersects a vertical intermediate portion of a vertical axis of a substantially semi-cylindrical surface of the left side surface 14 of the convex fulcrum portion 13.
【００２３】そして、凹状支点部１０の左側面１１に凸
状支点部１３の左側面１４が当接し、図４及び図５に示
す如く、これら両側面１１，１４の接触状態は、上下方
向に沿う１本の接触線を有する線接触となる。また、凹
状支点部１０の右側面１２に凸状支点部１３の右側面１
５が当接し、図４及び図５に示す如く、これら両側面１
２，１５の接触状態は、上下方向略中間部に１つの接触
点１７を有する点接触となる。The left side surface 14 of the convex fulcrum 13 contacts the left side surface 11 of the concave fulcrum portion 10, and as shown in FIG. 4 and FIG. It is a line contact having one contact line along. Also, the right side surface 1 of the convex fulcrum portion 13 is provided on the right side surface 12 of the concave fulcrum portion 10.
5 are in contact with each other, as shown in FIGS.
The contact states 2 and 15 are point contacts having one contact point 17 at a substantially middle portion in the vertical direction.
【００２４】鍵２は、凹状支点部１０の左右側面１１，
１２と、凸状支点部１３の左右側面１４，１５との当接
部位、即ち接触部１６，１７を支点として上下方向（図
２中、矢印Ｙ方向）及び左右方向（図２中、矢印Ｘ方
向）に鍵盤として使用する動きの範囲で微小角度回動自
在で、ローリング方向（図２中、Ｒ方向）には動かない
ようになっている。The key 2 includes left and right side surfaces 11 of the concave fulcrum 10,
12 and the contact portions between the left and right side surfaces 14 and 15 of the convex fulcrum 13, that is, the contact portions 16 and 17 as fulcrums, in the up-down direction (arrow Y direction in FIG. 2) and the left-right direction (arrow X in FIG. 2). Direction), it is rotatable by a small angle within the range of movement used as a keyboard, and does not move in the rolling direction (R direction in FIG. 2).
【００２５】鍵２は板ばね（鍵復帰手段及び押圧手段）
１８により上方向に回動付勢されていると共に、凸状支
点部１３の左右側面１４，１５が凹状支点部１０の左右
側面１１，１２に圧接する方向（図２中、矢印Ｚ方向）
に押圧されている。板ばね１８は、図１に示す如く前端
部が鍵盤フレーム１の上面に設けられたばね受部材１９
に且つ後端部が鍵２の後端側凹部内面に設けられたばね
受部材２０にそれぞれ係止されている。The key 2 is a leaf spring (key return means and pressing means)
A direction in which the left and right side surfaces 14 and 15 of the convex fulcrum portion 13 are pressed against the left and right side surfaces 11 and 12 of the concave fulcrum portion 10 while being urged upwardly by 18 (in the direction of arrow Z in FIG. 2).
Is pressed. The leaf spring 18 has a spring receiving member 19 having a front end provided on the upper surface of the keyboard frame 1 as shown in FIG.
The rear end of the key 2 is locked by a spring receiving member 20 provided on the inner surface of the concave portion on the rear end side of the key 2.
【００２６】鍵２の前端側の一側壁下端縁部には略Ｌ字
状のストッパアーム２１が一体に突設されており、この
ストッパアーム２１の垂直片部２１ａは、前端壁４の前
面と離間対向している。また、ストッパアーム２１の水
平片部２１ｂは、前端壁４にその長手方向に間隔を存し
て複数個（図１においては１個のみ図示）穿設された上
下方向に細長いガイド孔２２内を移動自在に挿通され
て、鍵盤フレーム１の下面側に延出されている。各ガイ
ド孔２２の幅（左右方向の寸法）Ｗは、ストッパアーム
２１の板厚Ｌの２〜３倍に設定されている。従って、互
いに隣接する２つの鍵２のストッパアーム２１の水平片
部２１ｂが１つのガイド孔２２内に挿通される。A substantially L-shaped stopper arm 21 is integrally protruded from the lower end of one side wall of the front end side of the key 2, and the vertical piece 21 a of the stopper arm 21 is connected to the front surface of the front end wall 4. They face apart. The horizontal piece 21b of the stopper arm 21 is formed in a vertically elongated guide hole 22 formed in a plurality (only one is shown in FIG. 1) of the front end wall 4 at intervals in the longitudinal direction. It is movably inserted and extends to the lower surface side of the keyboard frame 1. The width (width in the left-right direction) W of each guide hole 22 is set to be two to three times the thickness L of the stopper arm 21. Therefore, the horizontal pieces 21b of the stopper arms 21 of the two keys 2 adjacent to each other are inserted into one guide hole 22.
【００２７】ストッパアーム２１の水平片部２１ｂの上
端縁部は、鍵盤フレーム１の前端縁部下面に添装固定さ
れたフェルト等よりなる上限ストッパ２３に当接するこ
とにより、鍵２の上限位置が規制される。また、ストッ
パアーム２１の水平片部２１ｂの下端縁部は、水平壁５
の上面に添装固定されたフェルト等よりなる下限ストッ
パ２４に当接することにより、鍵２の下限位置が規制さ
れる。The upper edge of the horizontal piece 21b of the stopper arm 21 abuts on an upper limit stopper 23 made of felt or the like attached to the lower surface of the front edge of the keyboard frame 1, so that the upper limit of the key 2 is adjusted. Be regulated. The lower end edge of the horizontal piece 21b of the stopper arm 21 is
The lower limit position of the key 2 is regulated by contacting a lower limit stopper 24 made of felt or the like attached and fixed to the upper surface of the key 2.
【００２８】鍵２の凹部内面にはスイッチ押圧部材（ア
クチュエータ）２５が一体に突設されている。このスイ
ッチ押圧部材２５の下端部は、鍵盤フレーム１に穿設さ
れた挿通孔２６内を移動自在に挿通されて、鍵スイッチ
アッセンブリ２７の内方に延出している。そして、鍵２
を板ばね１８の付勢力に抗して下方に押圧すると、スイ
ッチ押圧部材２５によって鍵スイッチアッセンブリ２７
のスイッチ部（図示省略）が押圧されて閉成することに
より発音制御回路（図示省略）が駆動し、当該押圧した
鍵２に対応する音高の音を発生するものである。A switch pressing member (actuator) 25 is integrally provided on the inner surface of the recess of the key 2. The lower end of the switch pressing member 25 is movably inserted into an insertion hole 26 formed in the keyboard frame 1, and extends inside the key switch assembly 27. And key 2
Is pressed downward against the urging force of the leaf spring 18, the key switch assembly 27 is pressed by the switch pressing member 25.
When a switch section (not shown) is pressed and closed, a sound control circuit (not shown) is driven to generate a sound having a pitch corresponding to the pressed key 2.
【００２９】鍵スイッチアッセンブリ２７は、鍵盤フレ
ーム１の下面に配設されている。また、鍵盤フレーム１
の前端縁側上面には、鍵２と対応する数の案内部材２８
が突設されている。この案内部材２８は鍵２の凹部内に
嵌合されて該鍵２の上下方向の動きを案内するもので、
この案内部材２８は鍵２の左右方向を規制するが、ロー
リング方向の動きが規制されることはない。The key switch assembly 27 is provided on the lower surface of the keyboard frame 1. In addition, keyboard frame 1
The guide members 28 corresponding to the number of keys 2
Is protruding. The guide member 28 is fitted in the recess of the key 2 to guide the vertical movement of the key 2.
The guide member 28 regulates the left and right directions of the key 2, but does not restrict the movement in the rolling direction.
【００３０】以上の構成において、凹状支点部１０の左
側面１１と、凸状支点部１３の左側面１４との接触状態
が上下方向に沿う１本の接触線１６を有する線接触で、
凹状支点部１０の右側面１２と凸状支点部１３の右側面
１５との接触状態が上下方向略中間部に１つの接触点１
７を有する点接触であるから、鍵２は接触線１６と接触
点１７を支点に上下及び左右方向に鍵盤として動く範囲
で微小角度回動することができる。この場合、特に鍵２
の主たる動きの方向である上下方向に対する摩擦が小さ
い。しかし、凹状支点部１０の左側面１１と、凸状支点
部１３の左側面１４との接触状態が上下方向に沿う１本
の接触部１６を有する線接触であるために、鍵２のロー
リング方向への回動は抑制される。In the above configuration, the contact state between the left side surface 11 of the concave fulcrum portion 10 and the left side surface 14 of the convex fulcrum portion 13 is a line contact having one contact line 16 extending vertically.
The contact state between the right side surface 12 of the concave fulcrum portion 10 and the right side surface 15 of the convex fulcrum portion 13 is one contact point 1 at a substantially middle portion in the vertical direction.
Since the key 2 is a point contact having the key 7, the key 2 can be rotated by a small angle within a range in which the key 2 moves up and down and left and right as a keyboard with the contact line 16 and the contact point 17 as fulcrums. In this case, especially key 2
The friction in the vertical direction, which is the main direction of the movement, is small. However, the contact state between the left side surface 11 of the concave fulcrum portion 10 and the left side surface 14 of the convex fulcrum portion 13 is a line contact having one contact portion 16 extending in the up-down direction. Rotation to is suppressed.
【００３１】従って、鍵２側の凸状支点部１３と鍵支持
部材７側の凹状支点部１０とは、１本の接触線１６と、
１つの接触点１７との２箇所で接触しているだけで、鍵
２の上下及び左右方向への動きは許容し、鍵２のローリ
ング方向への動きを抑制しているから、摩擦部が少なく
なって鍵の動きが円滑になり、鍵２のタッチ感が良好と
なると共に、雑音を発生しない。また、鍵２のローリン
グ方向への動きを抑制するための案内部材が不要となる
から、より一層摩擦部が少なくなる。更に、凹状支点部
１０の左右側面１１，１２は、その相互間が内端側に向
かうに従い漸次狭くなる如く傾斜し、しかも板ばね１８
により凸状支点部１３が凹状支点部１０に押圧されてい
ることによるくさび効果で、両支点部１３，１０相互間
に隙間が発生しないため、がたつくことがなく、雑音を
発生しないと共に、自動調芯される。Therefore, the convex fulcrum portion 13 on the key 2 side and the concave fulcrum portion 10 on the key support member 7 side form one contact line 16,
Since the key 2 is allowed to move in the up and down and left and right directions only by being in contact with two points with one contact point 17, the movement of the key 2 in the rolling direction is suppressed. As a result, the key moves smoothly, the touch feeling of the key 2 is improved, and no noise is generated. In addition, since a guide member for suppressing the movement of the key 2 in the rolling direction is not required, the friction portion is further reduced. Further, the left and right side surfaces 11 and 12 of the concave fulcrum portion 10 are inclined so that the distance between them gradually narrows toward the inner end side.
As a result, no wedge effect is produced by pressing the convex fulcrum portion 13 against the concave fulcrum portion 10 so that no gap is generated between the two fulcrum portions 13 and 10, so that there is no rattling, no noise is generated, and automatic adjustment is performed. Cored.
【００３２】なお、上述した如く鍵２の左右方向への動
きを抑制していないので、横揺れ鍵盤、即ち鍵２を左右
方向に微妙に動かすことによって、ビブラート、トレモ
ロ、パン、リヴァーブ等の変調効果を得る演奏を可能と
した鍵盤への適用が容易となる。この場合は、案内部材
２８の、鍵２の両側壁内面に当接する部位に、横揺れセ
ンサとしてポリエステルフィルムをベースにした銀電極
と感圧フィルムとからなる感圧センサを貼着すればよ
い。前記感圧センサは感圧ゴムであっても良い。Since the movement of the key 2 in the left-right direction is not suppressed as described above, the modulation of the vibrato, tremolo, pan, reverb, etc. can be achieved by slightly moving the key 2 in the lateral direction. It is easy to apply the present invention to a keyboard that allows a performance to be obtained. In this case, a pressure-sensitive sensor composed of a silver electrode based on a polyester film and a pressure-sensitive film may be attached as a roll sensor to a portion of the guide member 28 that comes into contact with the inner surfaces of both side walls of the key 2. The pressure sensor may be pressure sensitive rubber.
【００３３】［第２実施例］次に本発明の第２実施例を
図６〜図９に基づき説明する。なお、本実施例において
上述した第１実施例と同一部分については、図面に同一
符号を付して説明する。[Second Embodiment] Next, a second embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the same parts as those in the first embodiment described above will be described by attaching the same reference numerals to the drawings.
【００３４】図６は本発明の第２実施例に係る楽器の鍵
盤装置における凹状支点部と凸状支点部の非係合状態を
示す斜視図である。本実施例において第１実施例と異な
る点は、鍵支持部材７側の凹状支点部１０の左側面１１
を、垂直軸線を有する略半円筒面とし、右側面１２を水
平軸線を有する略半円筒面とし、また、鍵２側の凸状支
点部１３の左側面１４をフラット面とし、右側面１５を
略半球面としたことである。なお、凹状支点部１０を貫
通孔にすると、金型で成形できる。FIG. 6 is a perspective view showing a disengaged state of the concave fulcrum and the convex fulcrum in the keyboard device of the musical instrument according to the second embodiment of the present invention. This embodiment is different from the first embodiment in that the left side surface 11 of the concave fulcrum portion 10 on the key support member 7 side is different.
Is a substantially semi-cylindrical surface having a vertical axis, the right side 12 is a substantially semi-cylindrical surface having a horizontal axis, the left side 14 of the convex fulcrum 13 on the key 2 side is a flat surface, and the right side 15 is That is, a substantially hemispherical surface is used. If the concave fulcrum 10 is formed as a through-hole, it can be molded with a mold.
【００３５】本実施例の場合も、図７に示す如く両支点
部１０，１３を係合した状態において、凹状支点部１０
の左側面１１と凸状支点部１３の左側面１４との接触状
態は、図８及び図９に示す如く上下方向に沿う１本の接
触線１６を有する線接触となり、また、凹状支点部１０
の右側面１２と凸状支点部１３の右側面１５との接触状
態は、図８及び図９に示す如く上下方向略中間部に１つ
の接触点１７を有する点接触となり、第１実施例と同様
の効果を奏し得る。Also in the case of the present embodiment, the concave fulcrum portion 10 and the fulcrum portion 13 are engaged as shown in FIG.
The contact state between the left side surface 11 and the left side surface 14 of the convex fulcrum portion 13 is line contact having one contact line 16 extending in the vertical direction as shown in FIGS.
The contact state between the right side surface 12 and the right side surface 15 of the convex fulcrum portion 13 is a point contact having one contact point 17 at a substantially middle portion in the vertical direction as shown in FIGS. Similar effects can be obtained.
【００３６】［第３実施例］次に本発明の第３実施例を
図１０〜図１３に基づき説明する。なお、本実施例にお
いて上述した第１実施例と同一部分については、図面に
同一符号を付して説明する。[Third Embodiment] Next, a third embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the same parts as those in the first embodiment described above will be described by attaching the same reference numerals to the drawings.
【００３７】図１０は本発明の第３実施例に係る楽器の
鍵盤装置における凹状支点部と凸状支点部の非係合状態
を示す斜視図である。本実施例において第１実施例と異
なる点は、鍵支持部材７側の凹状支点部１０の左側面１
１を、垂直軸線を有する略半円筒面とし、右側面１２を
水平軸線を有すると共に中央部がくびれた鼓胴状面と
し、また鍵２側の凸状支点部１３の左側面１４をフラッ
ト面とし、右側面１５を水平軸線を有する略半円筒面と
したことである。FIG. 10 is a perspective view showing a disengaged state between a concave fulcrum and a convex fulcrum in a keyboard device for a musical instrument according to a third embodiment of the present invention. This embodiment is different from the first embodiment in that the left side surface 1 of the concave fulcrum portion 10 on the key support member 7 side is different.
1 is a substantially semi-cylindrical surface having a vertical axis, the right side 12 is a drum-shaped surface having a horizontal axis and a constricted central portion, and the left side 14 of the convex fulcrum 13 on the key 2 side is a flat surface. The right side surface 15 is a substantially semi-cylindrical surface having a horizontal axis.
【００３８】本実施例の場合も、図１１に示す如く両支
点部１０，１３を係合した状態において、凹状支点部１
０の左側面１１と凸状支点部１３の左側面１４との接触
状態は、図１２及び図１３に示す如く上下方向に沿う１
本の接触線１６を有する線接触となり、また、凹状支点
部１０の右側面１２と凸状支点部１３の右側面１５との
接触状態は、図１２及び図１３に示す如く上下方向略中
間部に１つの接触点１７を有する点接触となり、第１実
施例と同様の効果を奏し得る。Also in the case of the present embodiment, as shown in FIG. 11, when the two fulcrums 10 and 13 are engaged, the concave fulcrum 1
0 and the left side surface 14 of the convex fulcrum 13 are in contact with each other in the vertical direction as shown in FIGS.
The contact state between the right side surface 12 of the concave fulcrum portion 10 and the right side surface 15 of the convex fulcrum portion 13 is a line contact having two contact lines 16 as shown in FIGS. Point contact having one contact point 17 in the first embodiment, and the same effect as in the first embodiment can be obtained.
【００３９】［第４実施例］次に、本発明の第４実施例
を図１４〜図１６に基づき説明する。なお、本実施例に
おいて、上述した各実施例と同一部分については、図面
に同一符号を付して説明する。[Fourth Embodiment] Next, a fourth embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the same parts as those in the above-described embodiments will be described by attaching the same reference numerals to the drawings.
【００４０】本実施例において上述した各実施例と異な
る点は、図１４に示す如く上端部両側に突部２８ａ，２
８ｂを有する点接触型の案内部材２８′により、鍵２の
左右方向への動きを抑制したことである。即ち、上述し
た各実施例で説明した如く凹状支点部１０の左側面１１
と凸状支点部１３の左側面１４との接触状態が上下方向
に沿う１本の接触線１６を有する線接触となっているこ
とにより、鍵２のローリング方向の動きは、既に抑制さ
れているから、案内部材２８′としては、図１５に示す
如く鍵２の左右方向の動きを抑制するだけで良いもので
ある。従って、図１６に示す如く突部２８ａ，２８ｂが
択一的に鍵２の両側壁内面に接触する構成、即ち１点で
接触する構成であれば良いので、鍵２が案内部材２８′
に曲げ作用力を及ぼさなくて済む。The present embodiment is different from the above-described embodiments in that the projections 28a and 28a are provided on both sides of the upper end as shown in FIG.
That is, the point-to-point guide member 28 ′ having 8 b suppresses the movement of the key 2 in the left-right direction. That is, the left side surface 11 of the concave fulcrum portion 10 as described in each of the above-described embodiments.
The movement of the key 2 in the rolling direction is already suppressed because the contact state between the key 2 and the left side surface 14 of the convex fulcrum 13 is a line contact having one contact line 16 extending in the up-down direction. Therefore, the guide member 28 'only needs to suppress the movement of the key 2 in the left-right direction as shown in FIG. Therefore, as shown in FIG. 16, it is sufficient that the protrusions 28a and 28b make contact with the inner surfaces of both side walls of the key 2 alternatively, that is, at a single point.
It is not necessary to exert bending force on
【００４１】従来構成の場合、図１６の状態となったと
き鍵の一側壁内面に案内部材の一側縁側上端角部が接触
し、鍵の他側壁下端縁部が鍵の他側面に接触することに
より鍵が案内部材に曲げ作用力を及ぼしていた。In the case of the conventional configuration, when the state shown in FIG. 16 is reached, the upper edge of one side edge of the guide member contacts the inner surface of one side wall of the key, and the lower edge of the other side wall of the key contacts the other side surface of the key. As a result, the key exerted a bending force on the guide member.
【００４２】また、本実施例によれば、鍵２の案内部材
２８′との１点接触による低摩擦に加えて、鍵２の演奏
形態上、鍵２が案内部材２８′の突部２８ａ，２８ｂに
左右方向に強く押し付けられることもないので、鍵２の
動作時（演奏時）における摩擦は非常に小さくなる。According to the present embodiment, in addition to the low friction caused by the one-point contact of the key 2 with the guide member 28 ', the key 2 has a projection 28a, Since the key 2 is not strongly pressed in the left-right direction, the friction when the key 2 is operated (during playing) is very small.
【００４３】一方、凹状支点部１０と凸状支点部１３と
の接触部において発生する摺動摩擦は、てこ比（０対無
限大）の関係上、演奏に支障をきたすような大きさには
ならない。On the other hand, the sliding friction generated at the contact portion between the concave fulcrum portion 10 and the convex fulcrum portion 13 does not become large enough to hinder the performance due to the leverage ratio (0 to infinity). .
【００４４】本実施例の如く、上述した各実施例で説明
した構成の凹状支点部１０と凸状支点部１３とによる鍵
支点構造と、１点接触型の案内部材２８′とを組み合わ
せることによって、上述した従来の問題点を解消し得る
ものである。As in this embodiment, the key fulcrum structure composed of the concave fulcrum portion 10 and the convex fulcrum portion 13 having the structure described in each of the above embodiments is combined with the one-point contact type guide member 28 '. This can solve the conventional problems described above.
【００４５】［その他の実施例］上記各実施例において
は本発明を白鍵に適用した場合について説明したが、黒
鍵にも適用し得ることは勿論である。また、上記各実施
例においては、凸状支点部１３の形状を鍵２の後端部の
断面形状より小さくしたが、大きくしてもよい。このよ
うに凸状支点部１３の形状を大きくすれば、凹状支点部
１０の左側面１１と凸状支点部１３の左側面１４との接
触部１６の線接触の長さが長くなるので、鍵２のローリ
ング方向の動きに対する抑制がより一層確実になる。ま
た、上記各実施例においては、鍵支持部材７側に凹状支
点部１０を設け且つ鍵２の後端部側に凸状支点部１３を
設けた場合について説明したが、その逆、即ち鍵支持部
材７側に凸状支点部１３を、鍵２の後端部側に凹状支点
部１０をそれぞれ設けても良い。また、上記各実施例に
おいては、凹状支点部１０の左右側面１１，１２の形状
を左右逆にし、これに伴い凸状支点部１３の左右側面１
４，１５の形状を左右逆にしてもよい。更に、上記各実
施例では、板ばね１８を鍵復帰手段及び押圧手段とした
が、鍵復帰手段として重りや付勢部材を独立に設けても
良い。例えば、鍵支点を鍵の中間部とし、鍵後端に重り
を設けて鍵復帰手段とし、板ばねを押圧手段としてもよ
い。[Other Embodiments] In the above embodiments, the case where the present invention is applied to a white key has been described. However, it is needless to say that the present invention can also be applied to a black key. Further, in each of the above embodiments, the shape of the convex fulcrum portion 13 is smaller than the cross-sectional shape of the rear end portion of the key 2, but may be larger. If the shape of the convex fulcrum portion 13 is increased in this manner, the length of the line contact of the contact portion 16 between the left side surface 11 of the concave fulcrum portion 10 and the left side surface 14 of the convex fulcrum portion 13 becomes longer. 2 is more reliably suppressed in the rolling direction. In each of the above embodiments, the case where the concave fulcrum portion 10 is provided on the key support member 7 side and the convex fulcrum portion 13 is provided on the rear end side of the key 2 has been described. The convex fulcrum 13 may be provided on the member 7 side, and the concave fulcrum 10 may be provided on the rear end side of the key 2. In each of the above embodiments, the left and right side surfaces 11 and 12 of the concave fulcrum portion 10 are reversed left and right.
The shapes of 4 and 15 may be reversed left and right. Further, in each of the above embodiments, the leaf spring 18 is used as the key return means and the pressing means. However, a weight and an urging member may be independently provided as the key return means. For example, the key fulcrum may be an intermediate portion of the key, a weight may be provided at the rear end of the key to serve as key return means, and a leaf spring may serve as pressing means.
【００４６】［発明の効果］以上詳述した如く請求項１
〜４に記載の楽器の鍵盤装置によれば、凹状支点部と凸
状支点部とが上下方向に沿う１本の接触線を有する線接
触と、上下方向略中間部に１つの接触点を有する点接触
状態とで接触しているだけで、鍵の上下及び左右方向へ
の動きを許容し且つローリング方向への動きを抑制して
いる。[Effect of the Invention] As described in detail above, claim 1
According to the keyboard device of the musical instrument described in any one of (1) to (4), the concave fulcrum portion and the convex fulcrum portion have a line contact having one contact line along the vertical direction, and one contact point at a substantially middle portion in the vertical direction. Just by touching with the point contact state, the key is allowed to move in the vertical and horizontal directions, and the movement in the rolling direction is suppressed.
【００４７】このため、鍵の動作時における摩擦部が少
なくなり、鍵の動きが円滑となって、鍵のタッチ感が良
好になると共に、雑音を発生しない。また、鍵のローリ
ング方向への動きを抑制するための案内部材が不要とな
るから、鍵の動作時における摩擦力がより一層少なくな
る。Therefore, the frictional portion during the operation of the key is reduced, and the movement of the key is smooth, so that the touch feeling of the key is improved and no noise is generated. Further, since a guide member for suppressing the movement of the key in the rolling direction is not required, the frictional force during the operation of the key is further reduced.
【００４８】更に、凹状支点部の左右側面は、その相互
間が内端側に向かうに従い漸次狭くなる如く傾斜し、し
かも押圧手段により凸状支点部が凹状支点部に押圧され
ているので、くさび効果が生じ、両支点部相互間に隙間
が発生しないため、がたつくことがなく、雑音を発生し
ないと共に、自動調芯される。Further, the left and right side surfaces of the concave fulcrum are inclined so as to gradually become narrower as the distance between the concave fulcrum toward the inner end side, and the convex fulcrum is pressed by the concave fulcrum by the pressing means. Since an effect is produced and no gap is generated between the two fulcrum portions, there is no play, no noise is generated, and the self-alignment is performed.
【図１】本発明の第１実施例に係る楽器の鍵盤装置の一
部を切欠した要部斜視図である。FIG. 1 is a partially cutaway perspective view of a key device of a musical instrument according to a first embodiment of the present invention.
【図２】同装置における凹状支点部と凸状支点部の非係
合状態の斜視図である。FIG. 2 is a perspective view of the device in a state where a concave fulcrum and a convex fulcrum are not engaged.
【図３】同装置における凹状支点部と凸状支点部の係合
状態の斜視図である。FIG. 3 is a perspective view showing an engagement state between a concave fulcrum and a convex fulcrum in the device.
【図４】図３のＡ−Ａ線に沿う断面図である。FIG. 4 is a sectional view taken along line AA of FIG. 3;
【図５】図３のＢ−Ｂ線に沿う断面図である。FIG. 5 is a sectional view taken along the line BB in FIG. 3;
【図６】本発明の第２実施例に係る楽器の鍵盤装置にお
ける凹状支点部と凸状支点部の非係合状態の斜視図であ
る。FIG. 6 is a perspective view of a keyboard device of a musical instrument according to a second embodiment of the present invention in a state where a concave fulcrum and a convex fulcrum are not engaged.
【図７】同装置における凹状支点部と凸状支点部の係合
状態の斜視図である。FIG. 7 is a perspective view showing an engagement state between a concave fulcrum and a convex fulcrum in the device.
【図８】図７のＣ−Ｃ線に沿う断面図である。FIG. 8 is a sectional view taken along line CC of FIG. 7;
【図９】図７のＤ−Ｄ線に沿う断面図である。FIG. 9 is a sectional view taken along the line DD in FIG. 7;
【図１０】本発明の第３実施例に係る楽器の鍵盤装置に
おける凹状支点部と凸状支点部の非係合状態の斜視図で
ある。FIG. 10 is a perspective view of the keyboard device of the musical instrument according to the third embodiment of the present invention, in which the concave fulcrum and the convex fulcrum are not engaged.
【図１１】同装置における凹状支点部と凸状支点部の係
合状態の斜視図である。FIG. 11 is a perspective view showing a state in which a concave fulcrum and a convex fulcrum are engaged in the device.
【図１２】図１１のＥ−Ｅ線に沿う断面図である。FIG. 12 is a sectional view taken along the line EE in FIG. 11;
【図１３】図１１のＦ−Ｆ線に沿う断面図である。FIG. 13 is a sectional view taken along line FF of FIG. 11;
【図１４】本発明の第４実施例に係る楽器の鍵盤装置に
おける案内部材の斜視図である。FIG. 14 is a perspective view of a guide member in a keyboard device for a musical instrument according to a fourth embodiment of the present invention.
【図１５】図１４に示す案内部材と鍵との関係を示す一
部を切欠した斜視図である。15 is a partially cutaway perspective view showing the relationship between the guide member and the key shown in FIG.
【図１６】図１４に示す案内部材と鍵とが接触した状態
の断面図である。16 is a cross-sectional view showing a state where the guide member and the key shown in FIG. 14 are in contact with each other.
２ 鍵 ７ 鍵支持部材 １０ 凹状支点部 １１ 凹状支点部の左側面図 １２ 凹状支点部の右側面図 １３ 凸状支点部 １４ 凸状支点部の左側面 １５ 凸状支点部の右側面 １６ 接触線 １７ 接触点 １８ 板ばね（鍵復帰手段、押圧手段） 2 Key 7 Key support member 10 Concave fulcrum 11 Left side view of concave fulcrum 12 Right side view of concave fulcrum 13 Convex fulcrum 14 Left side of convex fulcrum 15 Right side of convex fulcrum 16 Contact line 17 contact point 18 leaf spring (key return means, pressing means)
Claims (9)
に、鍵に設けられた第２の支点部を押圧手段で押圧した
状態で互いに当接させ、これら第１及び第２の支点部の
互いに当接した部位を支点として前記鍵を上下方向に回
動自在にすると共に、前記鍵を鍵復帰手段により上方に
回動付勢してなる楽器の鍵盤装置において、前記第１及
び第２の支点部のいずれか一方を凹状とすると共に他方
を凸状とし、前記凹状支点部の左右側面と前記凸状支点
部の左右側面とが互いに当接し、前記凹状支点部の左右
側面のいずれか一方の側面と、該一方の側面に当接する
前記凸状支点部の一方の側面とを、これら両側面が互い
に接触したとき上下方向に沿う１本の接触線を有する線
接触状態となる形状にしたことを特徴とする楽器の鍵盤
装置。1. A first fulcrum provided on a key support member is brought into contact with a second fulcrum provided on a key in a state where the second fulcrum provided on the key is pressed by a pressing means. The key device of the musical instrument, wherein the key is rotatable in the vertical direction with the parts of the unit abutting on each other as a fulcrum, and the key is rotationally urged upward by key return means. one of the second fulcrum and the other a convex as well as concave, and the left and right side surfaces of the concave fulcrum and left and right side surfaces of the convex fulcrum portion abut each other, either of the right and left side surfaces of the concave fulcrum The one side and the one side of the convex fulcrum contacting the one side are in a line contact state having a single vertical contact line when the two sides contact each other. A keyboard device for musical instruments, characterized in that:
に、鍵に設けられた第２の支点部を押圧手段で押圧した
状態で互いに当接させ、これら第１及び第２の支点部の
互いに当接した部位を支点として前記鍵を上下方向に回
動自在にすると共に、前記鍵を鍵復帰手段により上方に
回動付勢してなる楽器の鍵盤装置において、前記第１及
び第２の支点部のいずれか一方を凹状とすると共に他方
を凸状とし、前記凹状支点部の左右側面と前記凸状支点
部の左右側面とが互いに当接し、前記凹状支点部の左右
側面間で形成される間隔が挿入口の間隔より奥側の間隔
の方を狭くなるように形成し、前記凹状支点部の左右側
面のいずれか一方の側面と、該一方の側面に当接する前
記凸状支点部の一方の側面とを、これら両側面が互いに
接触したとき上下方向に沿う１本の接触線を有する線接
触状態となる形状にしたことを特徴とする楽器の鍵盤装
置。2. A first fulcrum provided on a key support member is brought into contact with a second fulcrum provided on a key in a state where the second fulcrum provided on the key is pressed by a pressing means. The key device of the musical instrument, wherein the key is rotatable in the vertical direction with the parts of the unit abutting on each other as a fulcrum, and the key is rotationally urged upward by key return means. one of the second fulcrum and the other a convex with a concave front Stories and abut each other left and right sides of the left and right side surfaces of the concave fulcrum the convex fulcrum, between the left and right side surfaces of the concave fulcrum The gap formed at the rear side is formed to be narrower than the gap of the insertion port, and either one of the left and right side surfaces of the concave fulcrum portion and the convex shape contacting the one side surface When one side of the fulcrum is in contact with the other, A keyboard device for a musical instrument, wherein the keyboard device has a shape having a single line of contact along the line.
に、鍵に設けられた第２の支点部を押圧手段で押圧した
状態で互いに当接させ、これら第１及び第２の支点部の
互いに当接した部位を支点として前記鍵を上下方向に回
動自在にすると共に、前記鍵を鍵復帰手段により上方に
回動付勢してなる楽器の鍵盤装置において、前記第１及
び第２の支点部のいずれか一方を凹状とすると共に他方
を凸状とし、前記凹状支点部の左右側面と前記凸状支点
部の左右側面とが互いに当接し、前記凹状支点部の左右
側面のいずれか一方の側面と該一方の側面に当接する前
記凸状支点部の一方の側面とを、これら両側面が互いに
接触したとき上下方向に沿う１本の接触線を有する線接
触状態となる形状にし、更に前記凹状支点部の他方の側
面と該他方の側面に当接する前記凸状支点部の他方の側
面とが、互いに接触したとき回動自在な接触状態となる
形状にしたことを特徴とする楽器の鍵盤装置。3. A first fulcrum provided on the key support member is brought into contact with a second fulcrum provided on the key in a state where the second fulcrum provided on the key is pressed by pressing means. The key device of the musical instrument, wherein the key is rotatable in the vertical direction with the parts of the unit abutting on each other as a fulcrum, and the key is rotationally urged upward by key return means. One of the fulcrum portions is concave and the other is convex, and the left and right side surfaces of the concave fulcrum portion and the left and right side surfaces of the convex fulcrum portion are in contact with each other. The one side surface and the one side surface of the convex fulcrum portion abutting on the one side surface are shaped into a line contact state having one vertical contact line when these two side surfaces come into contact with each other. And the other side of the concave fulcrum and the other side. A keyboard device for a musical instrument, wherein the other side surface of the contacting convex fulcrum portion is shaped so as to be rotatable when in contact with each other.
に、鍵に設けられた第２の支点部を押圧手段で押圧した
状態で互いに当接させ、これら第１及び第２の支点部の
互いに当接した部位を支点として前記鍵を上下方向に回
動自在にすると共に、前記鍵を鍵復帰手段により上方に
回動付勢してなる楽器の鍵盤装置において、前記第１及
び第２の支点部は、少なくとも一部において、前記鍵の
側面に平行な接触線を有する線接触状態で互いに常に当
接して鍵左右方向の揺動を許容しつつ鍵長手方向軸回り
のローリングを抑制する支点構造を有し、前記第１及び
第２の支点部から所定距離、該軸方向に離れた鍵摺動部
が接触型の案内部材を鍵支持部材に設け、該案内部材に
より前記鍵の左右の動きを規制したことを特徴とする楽
器の鍵盤装置。4. A first fulcrum provided on the key support member is brought into contact with a second fulcrum provided on the key in a state where the second fulcrum provided on the key is pressed by pressing means. The key device of the musical instrument, wherein the key is rotatable in the vertical direction with the parts of the unit abutting on each other as a fulcrum, and the key is rotationally urged upward by key return means. The fulcrum portion of at least a part of the key
Always contact each other in line contact with contact lines parallel to the sides.
A fulcrum structure that suppresses rolling about the key longitudinal axis while allowing the key to swing in the left-right direction while in contact with the key, and a key slide that is separated from the first and second fulcrum portions by a predetermined distance in the axial direction. A keyboard device for a musical instrument, wherein a guide member of a contact type is provided on a key support member, and the left and right movements of the key are regulated by the guide member.
徴とする請求項４記載の楽器の鍵盤装置。 5. The key sliding portion is of a point contact type.
5. The keyboard device for a musical instrument according to claim 4, wherein:
に、鍵に設けられた第２の支点部を押圧手段で押圧した
状態で互いに当接させ、これら第１及び第２の支点部の
互いに当接した部位を支点として前記鍵を上下方向に回
動自在にすると共に、前記鍵を鍵復帰手段により上方に
回動付勢してなる楽器の鍵盤装置において、前記第１及
び第２の支点部のいずれか一方を凹状とすると共に他方
を凸状とし、前記凹状支点部の左右側面間で形成される
間隔が挿入口の間隔より奥側の間隔の方を狭く形成し、
前記凹状支点部の左右側面のいずれか一方の側面と該一
方の側面に当接する前記凸状支点部の一方の側面とを、
これら両側面が互いに接触したとき上下方向に沿う１本
の接触線を有する線接触状態となる形状にし、更に前記
凹状支点部の他方の側面と該他方の側面に当接する前記
凸状支点部の他方の側面とが、互いに接触したとき回動
自在な接触状態となる形状にしたことを特徴とする楽器
の鍵盤装置。6. A first fulcrum provided on a key support member is brought into contact with a second fulcrum provided on a key in a state where the second fulcrum provided on the key is pressed by a pressing means. The key device of the musical instrument, wherein the key is rotatable in the vertical direction with the parts of the unit abutting on each other as a fulcrum, and the key is rotationally urged upward by key return means. Either one of the fulcrum portions is concave and the other is convex, and the interval formed between the left and right side surfaces of the concave fulcrum portion is formed so that the interval on the back side is smaller than the interval of the insertion port,
Either one of the left and right side surfaces of the concave fulcrum portion and one side surface of the convex fulcrum portion contacting the one side surface,
When these two side surfaces are in contact with each other, the shape is brought into a line contact state having one contact line along the vertical direction, and the other side surface of the concave fulcrum portion and the convex fulcrum portion abutting on the other side surface are further formed. A keyboard device for a musical instrument, characterized in that the other side surface is shaped to be rotatable when in contact with each other.
に、鍵に設けられた第２の支点部を押圧手段で押圧した
状態で互いに当接させ、これら第１及び第２の支点部の
互いに当接した部位を支点として前記鍵を上下方向に回
動自在にすると共に、前記鍵を鍵復帰手段により上方に
回動付勢してなる楽器の鍵盤装置において、前記第１及
び第２の支点部のいずれか一方を凹状とすると共に他方
を凸状とし、前記凹状支点部の左右側面と前記凸状支点
部の左右側面とが互いに当接し、前記凹状支点部の左右
側面のいずれか一方の側面の形状を平面とし、該平面状
側面に当接する前記凸状支点部の一方の側面形状を略半
円弧面とすることにより、これら両面が互いに接触した
とき上下方向に沿う１本の接触線を有する線接触状態と
し、更に前記凹状支点部の他方の側面を略半円弧面と
し、該他方の側面に当接する前記凸状支点部の他方の側
面を略半球面とすることにより、これら両面が互いに接
触したとき上下方向に沿う所定接触部が１つの接触点を
有する点接触状態となる如くしたことを特徴とする楽器
の鍵盤装置。7. A first fulcrum provided on the key support member is brought into contact with a second fulcrum provided on the key in a state where the second fulcrum provided on the key is pressed by a pressing means, and the first and second fulcrum are provided. The key device of the musical instrument, wherein the key is rotatable in the vertical direction with the parts of the unit abutting on each other as a fulcrum, and the key is rotationally urged upward by key return means. One of the fulcrum portions is concave and the other is convex, and the left and right side surfaces of the concave fulcrum portion and the left and right side surfaces of the convex fulcrum portion are in contact with each other. The shape of one of the side surfaces is a flat surface, and the shape of one side surface of the convex fulcrum portion in contact with the flat side surface is a substantially semi-circular surface. A line contact state having a contact line of The other side surface of the portion is a substantially semi-arc surface, and the other side surface of the convex fulcrum portion abutting the other side surface is a substantially hemispheric surface, so that when these two surfaces come into contact with each other, a predetermined contact along the vertical direction A keyboard device for a musical instrument, characterized in that the part is in a point contact state having one contact point.
に、鍵に設けられた第２の支点部を押圧手段で押圧した
状態で互いに当接させ、これら第１及び第２の支点部の
互いに当接した部位を支点として前記鍵を上下方向に回
動自在にすると共に、前記鍵を鍵復帰手段により上方に
回動付勢してなる楽器の鍵盤装置において、前記第１及
び第２の支点部のいずれか一方を凹状とすると共に他方
を凸状とし、前記凹状支点部の左右側面と前記凸状支点
部の左右側面とが互いに当接し、前記凹状支点部の左右
側面のいずれか一方の側面の形状を略半円弧面とし、該
凹状支点部の一方の側面に当接する前記凸状支点部の一
方の側面形状を平面とすることにより、これら両面が互
いに接触したとき上下方向に沿う１本の接触線を有する
線接触状態とし、更に前記凹状支点部の他方の側面を略
半円弧面とし、該他方の側面に当接する前記凸状支点部
の他方の側面を略半球面とすることにより、これら両面
が互いに接触したとき上下方向に沿う所定接触部が１つ
の接触点を有する点接触状態となる如くしたことを特徴
とする楽器の鍵盤装置。8. A first fulcrum provided on the key support member is brought into contact with a second fulcrum provided on the key in a state where the second fulcrum provided on the key is pressed by a pressing means, and the first and second fulcrum are provided. The key device of the musical instrument, wherein the key is rotatable in the vertical direction with the parts of the unit abutting on each other as a fulcrum, and the key is rotationally urged upward by key return means. One of the fulcrum portions is concave and the other is convex, and the left and right side surfaces of the concave fulcrum portion and the left and right side surfaces of the convex fulcrum portion are in contact with each other. The shape of one of the side surfaces is a substantially semi-circular surface, and the shape of one side surface of the convex fulcrum portion abutting on one side surface of the concave fulcrum portion is a flat surface. To a line contact state having one contact line along The other side surface of the concave fulcrum portion is a substantially semi-circular arc surface, and the other side surface of the convex fulcrum portion abutting on the other side surface is a substantially hemispherical surface. A keyboard device for a musical instrument, wherein a predetermined contact portion along the contact portion has a point contact state having one contact point.
に、鍵に設けられた第２の支点部を押圧手段で押圧した
状態で互いに当接させ、これら第１及び第２の支点部の
互いに当接した部位を支点として前記鍵を上下方向に回
動自在にすると共に、前記鍵を鍵復帰手段により上方に
回動付勢してなる楽器の鍵盤装置において、前記第１及
び第２の支点部のいずれか一方を凹状とすると共に他方
を凸状とし、前記凹状支点部の左右側面と前記凸状支点
部の左右側面とが互いに当接し、前記凹状支点部の左右
側面のいずれか一方の側面の形状を略半円弧面とし、該
凹状支点部の一方の側面に当接する前記凸状支点部の一
方の側面形状を平面とすることにより、これら両面が互
いに接触したとき上下方向に沿う１本の接触線を有する
線接触状態とし、更に前記凹状支点部の他方の側面を中
央部にくびれ部のある鼓胴状面とし、該他方の側面に当
接する前記凸状支点部の他方の側面を略半円弧面とする
ことにより、これら両面が互いに接触したとき上下方向
に沿う所定接触部が１つの接触点を有する点接触状態と
なる如くしたことを特徴とする楽器の鍵盤装置。9. A first fulcrum provided on the key support member is brought into contact with a second fulcrum provided on the key in a state where the second fulcrum provided on the key is pressed by pressing means, and the first and second fulcrum are provided. The key device of the musical instrument, wherein the key is rotatable in the vertical direction with the parts of the unit abutting on each other as a fulcrum, and the key is rotationally urged upward by key return means. One of the fulcrum portions is concave and the other is convex, and the left and right side surfaces of the concave fulcrum portion and the left and right side surfaces of the convex fulcrum portion are in contact with each other. The shape of one of the side surfaces is a substantially semi-circular surface, and the shape of one side surface of the convex fulcrum portion abutting on one side surface of the concave fulcrum portion is a flat surface. To a line contact state having one contact line along The other side surface of the concave fulcrum portion is a drum-shaped surface having a constricted portion at the center, and the other side surface of the convex fulcrum portion abutting on the other side surface is a substantially semicircular arc surface. A keyboard device for a musical instrument, characterized in that a predetermined contact portion along the up-down direction is brought into a point contact state having one contact point when they touch each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4317896A JP2848166B2 (en) | 1992-11-02 | 1992-11-02 | Musical instrument keyboard device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4317896A JP2848166B2 (en) | 1992-11-02 | 1992-11-02 | Musical instrument keyboard device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06149229A JPH06149229A (en) | 1994-05-27 |
| JP2848166B2 true JP2848166B2 (en) | 1999-01-20 |
Family
ID=18093267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4317896A Expired - Lifetime JP2848166B2 (en) | 1992-11-02 | 1992-11-02 | Musical instrument keyboard device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2848166B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4839969B2 (en) * | 2006-06-08 | 2011-12-21 | ヤマハ株式会社 | Keyboard device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54143218U (en) * | 1978-03-29 | 1979-10-04 | ||
| JPS5757417U (en) * | 1980-09-20 | 1982-04-05 |
-
1992
- 1992-11-02 JP JP4317896A patent/JP2848166B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06149229A (en) | 1994-05-27 |
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